Sideload WebOS app on LG Smart TV?

I developed an IPTV app with EPG for Samsung and LG and I submitted the app to both stores.
Both companies are messing around since over two months with it, so I decided to release the app on the web until it is released on the official stores.

I was able to use the official demo packaging tool for Samsung, so the app can be installed on Samsung smart TVs from an USB stick.

Is there a similar way to install apps on LG smart TVs?
If yes, can somebody point me to a tutorial or software or something?